<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="jquery-1.11.1.min.js"></script>
    <script>
        $(document).ready(function(){
            alert(1);
        })

        jQuery(document).ready(function(){
            alert(2);
        })

        console.log($ === jQuery);    //true
    </script>
</head>
<body>

</body>
</html>